Script To Delete File If 1st Line Is Blank.

I have a folder full of text files, some have data in the first line, some do not.
Any ideas how I can delete the files that do not have any data in the first line?

 

The command to 'delete the file if first line blank' using stream editor in Linux bash shell :
sed '1{/^$/d}' file
You could then use Cygwin to run the command in Windows and see if this works?
Someone may have another solution!

 

Will that go through each text file in the directory?

 

If no, to point this command at a particular directory containing the txt files i would try this on a test copy of the folder first :
sed '1{/^$/d}' file ls -al /(directory name)
Im no sed expert, but i will play around with this problem on my kali machine and try to find what works!
This should be fun!

Edit: Does the directory contain any sub-directories or just the said files?

 

To enter a directory and modify from the terminal in linux i use the cd (directory name) command so perhaps:
cd (directory name) enter, then
sed '1{/^$/d}' file

 

The cd (directory name) command should work in dos also so you would only have to Cygwin sed '1{/^$/d}' file for this to run in dos also.
How i would get this job done would be to run a distro of Linux in my oracle virtual box (Linux Mint18), then create a network file share with my windows host machine, share the folder and bypass Cygwin altogether.
Post #5 should then work no problems for all files in the directory (providing they are not in sub directories)

 

all the files are in one directory. Can I specify only text files? there are a few other types in there?
Appreciate all the help... Can you explain the script parameter by parameter?
I'm guessing you are looking at the 1 line , what does ^$ do? , then deleting the file.. is that the just of the code?

 

Sed runs the stream editor, putting the 1 in front with /^$/d encased in {} makes the script delete file (expressed by file) only if the first line if blank. This will work for all files, not just txt.
You could give the script permission, say, to do same with lines 1 to 5 of the file by using 1,5
ie. sed '1,5{/^$/d}' file

 

C:\Program Files (x86)\GnuWin32\bin>sed sed '1{/^$/d}' file
sed: -e expression #1, char 3: unterminated `s' command

 

Thanks for sharing that....will give it a whirl!